NAME¶
NATGRIDS - primary single precision Fortran entry for natural neighbor gridding
SYNOPSIS¶
CALL NATGRIDS (NPNTS, X, Y, Z, NUMXOUT, NUMYOUT, XI, YI, ZI, IER)
DESCRIPTION¶
- NPNTS
- (Integer, Input) - The number of input data points. (NPNTS > 3).
- X
- (Real, Input) - An array containing the X coordinates of the input data
points.
- Y
- (Real, Input) - An array containing the Y coordinates of the input data
points.
- Z
- (Real, Input) - An array containing the functional values of the input
data points. That is, Z(L) is the value of the input function at
coordinate (X(L),Y(L)), for L=1,NPNTS.
- NUMXOUT
- (Integer, Input) - The number of X values in the output grid.
- NUMYOUT
- (Integer, Input) - The number of Y values in the output grid.
- XI
- (Real, Input) - An array of dimension NUMXOUT containing the X coordinates
of the output data grid. The values in XI must be increasing, but need not
be equally spaced.
- YI
- (Real, Input) - An array of dimension NUMYOUT containing the Y coordinates
of the output data grid. The values in YI must be increasing, but need not
be equally spaced.
- ZI
- (Real, Output) - A two-dimensional array of dimension NUMXOUT x NUMYOUT
containing the interpolated functional values. ZI(I,J) is the interpolated
value at grid point (XI(I),YI(J)).
- IER
- (Integer, Output) - An error return value. If IER is returned as 0, then
no errors were detected. If IER is non-zero, then refer to the man page
for natgrid_errors for details.
USAGE¶
NATGRIDS is the single precision gridding function in the Natgrid package. The
behavior of NATGRIDS is controlled by values set for the various parameters
described in natgrid_params. Values for these parameters can be set using the
subroutines NNSETI, NNSETR, and NNSETC.
ACCESS¶
To use NATGRIDS, load the NCAR Graphics library ngmath.
SEE ALSO¶
natgrid, natgrid_params, nnseti, nngeti, nnsetr, nngetr, nnsetc, nngetc.
Complete documentation for Natgrid is available at URL
http://ngwww.ucar.edu/ngdoc/ng/ngmath/natgrid/nnhome.html
COPYRIGHT¶
Copyright (C) 2000
University Corporation for Atmospheric Research
The use of this Software is governed by a License Agreement.